strbuf: introduce starts_with() and ends_with()

prefixcmp() and suffixcmp() share the common "cmp" suffix that
typically are used to name functions that can be used for ordering,
but they can't, because they are not antisymmetric:

        prefixcmp("foo", "foobar") < 0
        prefixcmp("foobar", "foo") == 0

We in fact do not use these functions for ordering.  Replace them
with functions that just check for equality.

Add starts_with() and end_with() that will be used to replace
prefixcmp() and suffixcmp(), respectively, as the first step.  These
are named after corresponding functions/methods in programming
languages, like Java, Python and Ruby.

In vcs-svn/fast_export.c, there was already an ends_with() function
that did the same thing. Let's use the new one instead while at it.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder
2013-12-01 08:49:16 +01:00
committed by Junio C Hamano
parent 3fb5aead29
commit 956623157f
3 changed files with 21 additions and 10 deletions

View File

@ -350,7 +350,9 @@ extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_lis
extern void set_error_routine(void (*routine)(const char *err, va_list params));
extern void set_die_is_recursing_routine(int (*routine)(void));
extern int starts_with(const char *str, const char *prefix);
extern int prefixcmp(const char *str, const char *prefix);
extern int ends_with(const char *str, const char *suffix);
extern int suffixcmp(const char *str, const char *suffix);
static inline const char *skip_prefix(const char *str, const char *prefix)